Electric heater



FIG. 1 is a top front and right side perspective view of electric heater showing my new design;

FIG. 2 is a top rear and left side perspective view of electric heater showing my new design;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

In the drawings, the broken lines depict unclaimed subject matter only and form no part of the claimed design. 

CLAIM The ornamental design for an electric heater, as shown and described. 